Betty,
The son John (chr. 4 May 1800) of parents John Fargher and Jane Creer is the John Fargher who married Margaret Gelling. Based on Paul Creer's will (1807), Jane's parents are Paul Creer and Eleanor Kissack. I believe that the parents of John Fargher (sr.) are Philip Fargher (chr. 5 Mar 1718)and Ann Cain (chr. 1722).
Bill